Littelfuse 0RLS600.X Fuse Cartridge - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0RLS600.X is a 600A, 600 VAC cylindrical fuse cartridge from the POWR-GARD® RLS series, designed for electrical and industrial applications requiring fast-blow response characteristics. This part is classified as obsolete, necessitating identification of active equivalent components that maintain functional compatibility while meeting current availability and compliance requirements.

Substiute Parts

0RLS600.X

Littelfuse Inc.In Stock: 11200RLS600.X Datasheet

Current PartRFQ

KLSR600.X

Littelfuse Inc.In Stock: 831KLSR600.X Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse KLSR600.X qualifies as a direct functional substitute based on the following critical parameters:

Matching Parameters:

• Current Rating: 600A (identical)
• Voltage Rating - AC: 600 VAC (identical)
• Fuse Type: Cartridge (identical)
• Response Time: Fast Blow (identical)
• Package / Case: Cylindrical, Blade Terminals (identical)
• Mounting Type: Requires Holder (identical)
• Approval Agencies: CE, CSA, UL (identical)

Enhanced Specifications: The KLSR600.X provides additional DC voltage capability (300 VDC) and superior breaking capacity (200kA AC, 20kA DC versus 10kA), while maintaining all AC parameters of the original part. The substitute operates in Class RK1 versus the original Class H designation, reflecting improved performance characteristics within the same application envelope.

Parameter Comparison

Engineering Selection Recommendations

The KLSR600.X is the designated manufacturer substitute for the obsolete 0RLS600.X. Selection of the KLSR600.X is supported by:

• Active product status with current manufacturing and availability
• Identical current and AC voltage ratings ensuring direct functional compatibility
• Maintained certifications (CE, CSA, UL) across both parts
• Enhanced breaking capacity and DC voltage capability providing superior performance margins
• ROHS3 compliance meeting current environmental and regulatory standards
• Identical mechanical interface (cylindrical, blade terminals) and holder compatibility

The increased physical length (13.374" versus 8.870") must be verified for fit within existing fuse holder assemblies prior to implementation.

Frequently Asked Questions (FAQ)

Q: Can the KLSR600.X directly replace the 0RLS600.X in existing installations?

A: The KLSR600.X maintains identical current rating (600A), AC voltage rating (600 VAC), fuse type (cartridge), response time (fast blow), and mechanical interface (cylindrical, blade terminals). Physical length differs (13.374" L versus 8.870" L); holder compatibility must be confirmed before substitution.

Q: What is the difference between Class H and Class RK1 fuses?

A: Both classes are fast-blow cartridge fuses suitable for electrical and industrial applications. The KLSR600.X Class RK1 designation reflects enhanced breaking capacity (200kA AC versus 10kA) and dual voltage capability (600 VAC / 300 VDC versus 600 VAC only).

Q: Are the certifications equivalent between the two parts?

A: Both parts carry identical approval agencies: CE, CSA, and UL. The KLSR600.X additionally meets ROHS3 compliance requirements.

Q: What is the inventory status of these parts?

A: The 0RLS600.X (obsolete) has 1041 pcs in stock. The KLSR600.X (active) has 802 pcs in stock.

Q: Does the KLSR600.X support DC applications?

A: The KLSR600.X is rated for 300 VDC in addition to 600 VAC. The original 0RLS600.X does not specify DC voltage capability.